Improvement in permutation-padlocks



G. HAMILTON. Permutaton-Padlook.

No. 196,224. Patented Oct. 16,1877.

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G. HAMILTON; Permutation-Padlook.

No. 196,224. Patented Oct. 16, 1877.

Ex l.lll

UNITED STATES ATnNT OFFICE.

GEORGE HAMILTON, OF MEADVILLE, PENNSYLVANIA.

d IMPROVEMENT IN PERIVIUTATION-PADLOCKS.

Specification forming part of Letters Patent No. 196,224, dated October16, 1877; application lcd August 2l, 1877.

To all lwhom 'it may concern:

Be it known that I, GEORGE HAMILTON, of Meadville, in the county ofCrawford and State of Pennsylvania, have invented an ImprovedPermutation-Padlock, of which the following is a full, clear, and exactdescription,reference being had to the accompanying drawing, and theletters of reference marked thereon, making part of this specification,in which- Figure l is a top-plan view. Fig. 2 is a topplan view, thefaceplate being removed. Fig. 3 is a side view of the tumblers anddisks. Fig. 4 is a top-plan view of one of the disks. Fig. 5 is avertical sectional view.

The nature of my invention consists in a novel arrangement of mechanismin a permutation-padlock whereby the padlock can be opened or fastened,and the combination also ascertained at night or in the dark, as morefully hereinafter described.

The construction and operation of my invention are as follows:

A is the lock-case, and B the bow to hold onto a staple, both of whichare constructed out of any suitable material. In the face A1 of thelock-case is cut a circular orifice, a, around the periphery of which isarranged a series of letters. To the lower -face A2 of the case A, andinside of the same, is secured a pin or step. Upon this pin arejournaled the tinnblers, notched plates, and indexrings, the top of theseries being provided with an annular ange, a', upon which rests thefaceAl. D Dl D2 are disks which are connected,

` respectively, with the index-rings C G1 C2. The

cylinder which connects each one of these disks D Dl D2 and rings C ClC2 forms, as it were, a sleeve, upon which the tumblers E El E2 work.These cylinders are contained within each other, the tumblers beingarranged thereon in such manner that they will turn with them unlessprevented, as hereinafter described, when the combination is to bechanged. On each of the index-rings O C1 O2 are arranged, at properdistances, a series of figures, while on the periphery of the disks D DlD2 are cut notches d, arranged at proper distances, and equal in numberto the spaces contained on the respective indexring with which it isconnected. These disks D Dl D2 are also each provided with a doublenotch, d. Around the indexrings, and on the face-plate A1, at properdistances apa-rt, are arranged a series of letters. To each oftheindex-rings are secured two pins, c c, at equal distances apart, which,in connection with the key, enable the cylinders connecting theindex-rings and the disks to be turned, and thus operate the tumblers EE1 E2. These tumblers E El E2 are each provided with a notch, c. F is acurved arm, which is pivoted at f to a lug, Fl, secured to the side ofthe lock-case A. This circular arm F is provided with two projectingarms, FZ F3. To the arm F2 is pivoted, at f1, the thumb-piece f2, whichextends out beyond the side of the case, passing through a hole cut inthe same for that purpose. The arm F3 operates the latch F4, working ina recess cut in the under face of the same. In the upper section of thearm F is cut a curved slot, f3. F4 is the latch, which is supported onsuitable ybearings securedl to the case. This latch is provided with arecess, in which works the arm F3, by means of which the latch is movedbackward and forward. Gr is the depending catch, which works betweencleats g g, secured to the case, and has a free movement up and down.This catch is provided with a pin, g', which works in the slot f3, and.also with teeth at its lower section, said teeth corresponding in numberto the tumblers employed. apart equal to the width of the disks D Dl D2.G is an arched slotted guide-plate secured to the lower plate of thelock, and in the slot of which the lower end of the catch G travels. Ilis a spring, which has its bearing in a lug, 71 located on one side ofthe case. The free end of this spring presses against the arm F3.

The tension of this spring is constantly eX- erted to push the latchforward and keep the lock fastened. H' is another spring, which has itsbearing also in the lug h, while its free end presses against the end bof the bow B. K is a spring, which is bent nearly at a right angle atits lower section, and has its bearing in the lug F1. 7c is a pin whichpasses through a hole cut in the side of the case. The end of this pinrests against the spring K. In the drawing but one spring is shown. Thenumber of springs, however, that re used mustbe equal to the number ofdisks.

The operation is as follows: When the lock These teeth are separated adistance

